Even if she was given for free and is extremely meta, I don't think I can steel myself to use her just because of how grating she was throughout the entire event.

While they tried to justify how she felt and why she is that way, I would feel no remorse if I got the opportunity to knock her out.

Honestly, I feel like TD's events are great but there's always just some flaws that breaks it for me (Ocean Sovereign comes to mind with how perilous they made the PV seem, but I felt like part 2 completely fell flat due to lack of tension, no voice acting too). This event felt great in terms of mystery, visuals and tension, but the way they handled Gretel just tarnishes it for me.